the way to get this shot isn't spot healing brush, it's taking two shots, one with the guy and the box, the other with just the background, and then using layer masks to cover over the box with the shot of no background. you may need three shots, one of the guy on the box, one of the background, and one of the background with somebody holding some object that will cast a shadow roughly where the guy is, so that you can get the shadows right.