Hello aspirant!!

The cutoff marks will be varying each and every year based on the some factors such as number of students, difficulty level of the question paper, etc. But the cutoff marks for nits and iits will be always above 95 percentile in some cases it would be around 93 percent  not less than that. If you wanted to know about top nits in india kindly refer to the following link below...

https://engineering.careers360.com/colleges/list-of-top-nit-colleges-in-india

All the best!!!

Stay safe!!!