We will use a Future Value Formula:
FV=PV(1 + i)ⁿ
$939 is our Present Value (PV)
.06 (6%) will be substitued for i (interest)
6 years will be substituated for "n" (numbers of periods)
FV = $939 (1 + .06) ^6
FV = 1331.989446 or rounded to 1331.99 balance at the end of 6 years