Try this:

<p class="gwc-p mar-t20"  ng-repeat="shopdata in cartinfo.shopList.slice().reverse()" ></p>

Or declare a filter...

js:

app.filter('reverse', function() {
    return function(items) {
        return items.slice().reverse();
    };
});

view:

<p class="gwc-p mar-t20"  ng-repeat="shopdata in cartinfo.shopList | reverse" ></p>

js itself has the reverse function reverse()

<p class="gwc-p mar-t20" ng-repeat="shopdata in cartinfo.shopList | orderBy:shopId:reverse"></p>