RE: Just a little to the left.
DO NOT BEND THE BARREL. The "guy" at the gun shop is an idiot and to suggest such a dangerous action to an amateur should receive a beating. Post a picture of your sights and I assure you there is a way to adjust them whether its DIY, reqs a gunsmith or requires a new adj peep sights etc. There are always options.
edit: Also include at what range it is six feet off. 6 inches at 20 yds is alot different than 6 inches at 100.