What is the ruling on a person interfering in the review of files and assigning a grade to a participant without their knowledge, and would their success and admission to education based on that be considered doubtful?

For a person to raise your average is impermissible if your file does not deserve the added mark, and it is an injustice to the rest of the competitors, and the sin is upon him. However, since a number of reserves, including yourself, have been added, there is no problem in you taking up the position.