I have scored 66.4% in pcb and eng... Soo i m eligible for neet 2019 or not ?

Dear Ishita, you haven't mentioned your Category. Neverthless, English marks are not considered for checking eligibility criteria in NEET. So you should have scored a minimum aggregate of 50% in Physics, Chemistry and Biology/Biotechnology to be eligible for NEET. It is 50% for General Category, 45% for PWD and 40% for SC, ST, OBC. So based on your category, if you have scored the minimum aggregate, then you are eligible for NEET.

To be precise, yes, you are eligible for appearing for The neet exam.  Qualifying criteria is 50% aggregate in pcb which you have easily crossed.

Good luck