Shares of luxury retailer Nordstrom Inc. fell on a lower profit outlook for the year, citing disappointing sales from its more affluent shoppers. The forecast came despite a higher second-quarter profit. Nordstrom is also grappling with new demands — such as free shipping for online orders — from shoppers armed with smartphones. For the quarter, Nordstrom said sales at stores open at least a year rose 4.4 percent. But for its luxury stores, sales slipped 0.7 percent. For the period, the company said it earned $184 million, or 93 cents, topping estimates. In the same period a year ago, Nordstrom earned $156 million.