NEW YORK — Customers with expensive taste will have greater access to luxury now that Saks is planning to open five new Off 5th stores throughout the United States. According to the company, these new stores will be located in upscale outlet, lifestyle, or strip centers, and each store will be designed in Off 5TH's unique "luxury in a loft" format. The new stores should have a particular appeal to foreign tourists, who helped drive up same-store sales to about 15% at Saks' flagship New York store.