Hi Matt,
You can add the code of line in css as bellow:
ul.navmenu > li > a {
vertical-align: -41px;
line-height:20px;
display:inline-block;
}
Please use the value of line-height and and vertical align as your requirement. if any problem with that, please send us the url of the site so that we could give solution fast.
Note : Please use the custom css plugin or child theme for writing css.
Thanks