Ankit , the cut off for navy in jee main 2019 is yet to be published , the online portal for application is going to start on 2nd of june 2019 and is going to be closed on 21st of june 2019 . The cutoff is generally doesnt go that high , while I applied for it thay was in 2017 , the cut of overall 15 marks in jee and you would get the call letter , it generally doesnt go that high . From the recent trends it should be somewhere around 70 this year .

Hope it helps.