@donaldscho: Hello there,
Go to => Appearance => Customize => Additional CSS and add the following CSS Code.
.navigation-classic .main-navigation ul ul li:hover > ul, .navigation-classic .main-navigation ul ul li.focus > ul {
left: 100%;
right: auto;
}
.navigation-classic .main-navigation ul ul .menu-item-has-children > a::after, .navigation-classic .main-navigation ul ul .page_item_has_children > a::after {
-webkit-transform: rotate(-90deg);
-moz-transform: rotate(-90deg);
-ms-transform: rotate(-90deg);
transform: rotate(-90deg);
}
Let me know if this works out!
Kind Regards,
Skandha