Hello student with 75 percentile it's difficult to get admission in NIT's as we all know that seats are very limited and admission is directly based on merit rank.

Cut off vary every year on various factors like level of question in examination seats available and total nunumber of applicants in the entrance examination.

You can check for private colleges if you're willing to pursue engineering from private colleges.

To predict college use careers360 college predictor - https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Feel free to comment if you've any doubt

Good luck

I feel sorry to tell you that it is slightly difficult to get into a NIT based of the percentile you scored in your JEE mains but there is always a chance that you may get a good college on the state counselling like Haryana,Punjab,etc.

To check the best possible college based on your percentile i suggest you to please visit the college predictor tool available on the carrers360 website-

Happy learning.