Tapestry Inc. wanted to supersize its business through acquisition — but staying focused and letting Coach drive results is working out just fine. Excluding the recently sold Stuart Weitzman business, Tapestry’s fiscal first-quarter sales shot up 16 percent to $1.7 billion. That included a 22 percent jump at Coach, to $1.4 billion. Kate Spade, where the turnaround is still a work in progress, slipped 8 percent to $260.2 million. More from WWD “Fundamentally what’s driving our growth is new customer acqui ...