Shares of Five Below Inc. FIVE rose 5.2% after hours on Thursday after the teen-and-tween-focused discount retailer raised the low end of its full-year revenue and profit forecasts, even as management said its customers faced “multiple macro headwinds.” The chain — which sells things like toys, gear and electronics largely priced at $5 or less — said it expected full-year revenue of between $3.5 billion and $3.57 billion, helped by plans to open more than 200 new stores, with same-store sales up 1% to 3% and earnings per share of $5.31 to $5.71. That compares with a prior revenue forecast of $3.49 billion to $3.59 billion,…