Zumiez Inc. (NASDAQ: ZUMZ) posted a same-store sales increase of 6.6% for September. Retail Metrics estimated a rise of 2.7%. Total sales for the month were $66.3 million, up 12.5% over September of 2013. Shares were trading up nearly 3% at $29.52 in a 52-week range of $20.68 to $33.64.