Hello Abel

With 90 percentile your expected all India rank will be around 86, 901.

See your admission to NIT depends on cut off of nit Institutes No doubt your percentile is quite good and you have chances of  getting seat in nit but there's tough competition too.

Cut off of Institutions depends on number of students appeared and qualified in exam, difficulty level of exam and previous year's cut off of Colleges.

Last year's JEE main qualifying score was 89.7548849 for general category. This year cut off may be high.

So for more information refer to the link given below

https://engineering.career360.com/jee-main-college-predictor