With 75 percentile, there is no chance to get into top and old NITs. Furthermore getting into new NITs and super new NITs prospect is also kinda dull. However, you may opt for a good stste government college with good stream to boost your career.

This link will help you in giving you a rough estimate in finding a good engineering college based on your rank:- https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

In my opinion, you may land on some North East NIT ith an odd branch with detrimental placement projects. It would rather be better to chhose a good state government college with good stream of your interest which has brighter placement scenario.