You haven't mentioned your Home State. This is important because the cut offs are far more feasible for Home State Candidates when compared to Other State Candidates. Nevertheless, going by the formula 100-91.3*869010/100, your All India rank is approximately 75603 where in 91.3 is your percentile and 869010 is the no.of Candidates who appeared for January session. With this rank, it is tad difficult for a seat in NIT even with OBC reservation. You may have to appear for July session. Now cut offs change every year but with this rank, it is tad difficult. Please refer to our page https://engineering.careers360.com/articles/nits-cutoff-for-top-btech-branches for the NIT cut offs of previous years. To check the list of colleges that you can get with this percentile, please use our college predictor: https://engineering.careers360.com/jee-main-college-predictor. You can prepare for JEE Mains using our Knockout package: https://learn.careers360.com/knockout-jee-main-april/