Its a brand new bike? First thing is to take it back to the bike shop and see if they'll exchange it for the next larger size FX7.4. If its a brand new bike, with almost zero miles, and clean, they should do this (unless its a close-out model).

Second, try a handlebar with a greater 'rise' in the center part of the bar (where it attaches to the bar stem). The bike shop may be able to put one of these on for you. They might do it for free, but more likely charge a small labor fee and give you the new handlebars at a discount price. This will probably be what the bike shop will suggest, especially if they can't/won't exchange the bike for a larger size model. Still OK, really won't effect the bikes performance.

Third, you'll have to put on one of those riser thingies you posted in the Nashbar link. Make that the last option. They work OK (I have one on a utility bike I bought used), but on a new bike I'd rather start with everything fitted and working correctly.