I think you should make the wall pop more, everything is kind of dull but I feel if you just increase the brightness, the light pink shirt will be blown out. I don't see any blur. I'd say instead of trying to fix this one, re-shoot and maybe you could straighten the shirt on the mannequin/pole. Try positioning your light [flash?] so that there is not shadow, kind of takes away from the photo for me.
And yes, ironing the shirt would have made an impact.
If there's low light, use a tripod.
Was this taken with a P&S or DSLR? I would try manually focusing if you think it's still blurry.
*Look at some clothes websites and see how they have their light and backgrounds.
*What's your focal length?