How to display webform results under the webform with contextual filters?
1. create a views block display of your view

configure the view as you wish
but you have to add contextual filter by content:nid as shown below with setting: raw value from URL, path compoment 2 

  

We have to specify validation criteria content: webform as shown below



2. add the views block in a block region

Now if you visit a webform will show under it the relevant submissions