That's better than the 4.7 percent increase that analysts polled by Thomson Reuters were expecting.
Nordstrom shares rose 51 cents to $51.07 in morning trading. They are trading closer to the upper end of their 52-week range of $37.28 to $57.75.
Revenue at stores open at least a year is an important measure of a retailer's health because it's unaffected by sales at stores that recently opened or closed.
Total revenue for the five weeks ended June 30 rose nearly 13 percent to $1.04 billion.
For the fiscal year up to that point, sales at the company's stores open at least a year rose 7.8 percent from a year earlier and total sales increased 12.6 percent to $4.45 billion, Nordstrom said.
Nordstrom says sales were strongest in the South and Midwest.
Nordstrom operates 231 stores in 31 states.
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