Hello aspirant

Hope you are doing great there . First of all you need not be depressed . As you mentioned above , you scored a bit less in your improvement exams , therefore your initial score that is 79% will be taken into account . Since the best of both the sessions will be taken into account . Therefore you can attempt JEE Mains . If you still have a doubt then you can also contact NTA query centre .

I hope my answer helps

Wish you all the very best!