Will I face difficulty in getting placements above 6lacs? I am non engineering with overall 72% in academics 15 months exp in retail.

You are a having 1+ year work-ex and 72% is good to qualify for most of the companies. The average package is 6.5 LPA. and engineering is not a criteria put by many companies. So, you may not face difficulty in getting 6+ if you choose your companies wisely.