Hi aspirant

68%ile is low to get any of top colleges.

You can get state engineering colleges .You must be knowing form this year onwards all state engineering college will take admission on the basis of JEE mains marks .You must apply for state counslling.

You haven't scored enough to get NITs/IIITs and GFTIs .So you can try for state engineering colleges.

If you have appeared in other engineering entrances like BITSAT,VITEEE,SRMJEE,GITAM,Manipal or any other ,You can try to get college through them.

Use college predictor to predict you colleges on the basis of your rank,category and home state: https://engineering.careers360.com/jee-main-college-predictor

Hope this was helpful.