The world’s biggest coffee chain also announced that director Kevin Johnson would become Starbucks president and chief operating officer, effective March 1, replacing long-time executive Troy Alstead, who said he is taking an extended sabbatical to spend time with his family. Starbucks shares jumped $3.36, or 4.1 percent, to $86.10 in extended trade. Sales at Starbucks cafes open at least 13 months were up 5 percent for the U.S.-dominated Americas region in the first quarter that ended Dec. 28. Starbucks’ Americas region contributes the majority of company revenue.