Sales will not help in this position. You need to make sure during the interview that you make it clear you are good with customers. Especially you are good with RUDE customers. That you are not afraid to make phone calls. That you are capable of planning massive projects, and MULTITASKING.
Basically this is a two interview process. The first one is with the HR manager. This is the easy one. The second, and more difficult interview, is with the store manager. This is the time to show you can work with angry and rude customers well, and that you can communicate with installers and vendors well. It wouldn't hurt if you had a background in home improvement. Especially in floors, plumbing, doors, windows, decking, fencing, and kitchens.