Hello charannagavijay. Welcome to Careers360. I would like to tell you that the second exam of JEE Mains will held in the month of April. After that the exact rank will be uploaded on NTA’s offficial website. I would suggest you to give another attempt as it would be difficult for you to get admission in NIT with this percentile. For your reference I am leaving a link which you can follow to check previous years cutoffs. 

https://www.google.co.in/amp/s/engineering.careers360.com/articles/jee-main-cutoff-for-top-nits/amp

Hope this answer helps you. If you have any other query you can drop them in the comments section below. All the best.