In Evolve+ you are able to replace the bootstrap slider with revolution slider, there is settings within Add/Edit post or page to do that.
However in Evolve free theme you can only paste the shortcode in the content.
This is why the content boxes are above your revolution slider.
Thank you very much for purchasing Alora Theme, but please note that this forum is for Evolve+ only.
As an employee, I have company rules to follow. I cannot be answering anymore of your Evolve free theme’s question here. Please kindly post at the free theme support forum. https://wordpress.org/support/theme/evolve