I've got 70.1% percentile in jee mains 2020 and I'm pwd candidate, is there any possibility to get nit goa? (and I've 79% percentage in boards)

Your rank can be predicted by using the formula, (100-your total percentile)*869010/100. In your case, your approximate rank would be 260616. Let's say the number of candidates for April exam increased to 12,00,000 then your final rank shall be (100 - your total score) X 12,00,000/100. Regarding NIT Goa, you haven't mentioned your Category. Neverthless, you can check the previous cut offs for NIT Goa at our page: https://engineering.careers360.com/articles/jee-main-cutoff-for-nit-goa
Now to predict colleges, please use our college predictor:
https://engineering.careers360.com/jee-main-college-predictor