Answer the question of the value of the score first: the higher the GPA, the better. If you can upgrade from 75+ to 80+, the school you apply for will be by going up one flight of stairs.
Answer the accreditation question of foreign schools again: foreign schools only recognize the transcripts issued by your school. If the principle of your school's transcript is that the retake score is the final score of the transcript, it is best not to indicate the retake score, because foreign schools will not know that you retake the exam when they see such a transcript.
Finally, let's talk about marking: I retaken the advanced mathematics and line generation, and one * * is a course with 7.5 credits (many). It turned out to be a 70-60, my high number is 89, and the line generation is 98 ... it's too tiring. After the resumption of classes, my weighted average score of degree courses increased by two points (quite obviously), but when I applied, I used the weighted average score of all courses I studied in the university, and all elective courses were limited, so ... my total score only increased by a few tenths ... My eyes were full of tears. Moreover, I spent a lot of energy on rebuilding, which led to a lot of high scores in junior professional courses, and I felt that it was not worth the candle.
I suggest you make a careful calculation before you decide to take this course again. How much does it affect the weighted average branch of all your courses? If you think it's worth it, you should consider the influence of retaking the course on your study, whether you have enough energy and how to allocate your time. If the effect is obvious, you should cheer up and give yourself extra points for your future application ~ ~ But if the effect is not so obvious, you might as well not take this course again, study this semester's course well, see if there are any internship activities related to your research direction, and do something to give you extra points for your application. It's best to have paper, but it's hard to get it without the previous foundation ~
I wish you a good school in the future ~