Hi Aspirant,

Congratulations for scoring 79.46 perentile.Since you have not mentioned your caste whether general and reserved its difficult to say rank accurately.However considering general and based on previous years rank you can expect a rank of around 250k and around.If Sc and other categories rank may vary from 12k to 15 k.You can check the JEE Main rank Predictor through the link given below:

Hope it helps!!