Does your steer tube extend past the top of your stem? Is there like a half inch or so sticking up with some spacers stacked under it. If so you can adjust bar height, if not you'll see the center bolt that holds the stem down is pretty much flush with the top. You'll need to buy a new stem with more degrees or high rise handlebars if top bolt/cap is flush. Higher end stems have the degrees marked on them and sometimes handlebars give you the rise, width and sweep back.
Hopefully the bike manufacturer gave you enough shifter cable and brake slack to raise the bars.