My most professional salesperson gets average results. How do I help her step up?

She is an impressive young lady with impeccable manners, excellent communication skills, and is an example of a very professional salesperson. One that you would want on your team. When you look at her cubicle, it is filled with pictures of her husband, who I've met. They have a great relationship and her family is really important to her. Now to the problem, she sells at an average level. But I see a greater capacity within her. It's obvious to me that she could do much much better, but I'm not sure how I can connect her family values with the career. Do you have any advice?