Looking at your code with Rocket Loader enabled, I can see that our JS is inserted just before the body tag:
<script src="https://ajax.cloudflare.com/cdn-cgi/scripts/4f936b58/cloudflare-static/rocket-loader.min.js" data-cf-nonce="f7e49e31e18dd3e2e0899602-"></script>
<body oncontextmenu="return false;" class="post-template-default single single-post postid-55414 single-format-standard woocommerce-no-js tve-woo-minicart">
This is what is causing GTMetrix to see Rocket Loader as render blocking. The inline event
oncontextmenu="return false;" that you have applied to the body tag is causing Rocket Loader to need to execute earlier here. If you remove that, Rocket Loader will only be inserted at the bottom of your page and you’ll see performance improve.
Additionally, it’s bad for usability to disable the context menu - so I would recommend removing
oncontextmenu="return false;" regardless, here.