Hello.

It depends on your rank rather than your score if you can get into an NIT. The marks vs rank keeps changing each year along with the cutoff due to various factors like difficulty level of the exam and the average score of students etc. You could use the rank predictor to get an accurate estimate of your rank:

https://engineering.careers360.com/jee-main-architecture-rank-predictor

You could refer this link to know about the cutoff of the colleges:

https://engineering.careers360.com/articles/jee-main-cutoff-for-b-arch-b-planning

Good luck!