Among the more out-of-character things Wal-Mart Stores CEO H. Lee Scott has been talking up lately is the retailer's quest for more sales to more-affluent shoppers. To do it, the company's Wal-Mart (WMT) chain - which has built an empire out of going for the biggest discounts for the most price-conscious shoppers - is working to overhaul its merchandise mix, stores and image in hopes of snagging a share. "Our mistake was that we just kept our focus on how to get better value for that person who's under so much pressure," says Scott, explaining the strategy in an interview...