Its would be better if you use an online rank predictor. These are provided by top notch coaching institutes. Although they are'nt 100% accurate, it helps gives you a basic idea about your rank. Some rank predictors are :-

1. :: FIITJEE ::
2. JEE MAIN 2018 Rank Predictor

Hope this helps.

And this marks is good enough to get you food tech in good NITs too like even NIT Rourkela. Best of luck and work hard in future.

BEST OF LUCK!!