How can I Eliminate render-blocking JavaScript and CSS in above-the-fold content? I am using drupal 7 and Page speed in 82 for desktop on Google Page Insights. 
I am having some issues regarding eliminating render blocking js and css. 
How can I do this for aggregated js/css ? 
I know we cannot enable Leverage browser caching for external js.
I have used following modules:
1. Minify
2. Advanced CSS / JS Aggregation.

Please see the attached screenshot of Google Page Insights.
They are not render blocking. That is the main Drupal's js and css aggregated. Because they have most of the site's js and css in them, they end up quite large, and that makes most optimizers detect them as problematic. 

There is a high probability that you don't want to do anything about this.