Fourth Quarter Sales increased to $5.37 billion and Same-Store Sales increased 1.7% CHESAPEAKE, Va., 2016-Mar-04 — /EPR Retail News/ — Dollar Tree, Inc. (NASDAQ: DLTR), North America's leading operator of discount variety stores, today reported results for its fourth quarter and fiscal year ended January 30, 2016. Bob Sasser, Chief Executive Officer of Dollar Tree, stated, "I am…