Are you referring to the tabs under Prices? By default in Renew stack, it just change font text color like this:http://demo.theme.co/renew-1/shortcodes/tabbed-content/. But then you have the same font color. To help you better, can you clarify what you want to achieve?
Thanks for updating the thread! You use CSS to add them if you like. You can add this under Custom > CSS in the Customizer or in your child theme’s style.css file.
.x-nav-tabs li a:hover {
border-top: #0058A6 solid;
padding-top: 12px;
}