Change location of Blog post featured images

Is it possible to change the structure of the featured image on the blog post page to be next to the text instead of above it? Getting an image that's 800 pixels wide but only 100-200 tall is pretty hard. I don't like them to be huge either so I limit the height as much as I can. I love using the featured image for the widget sections too. It's hard to make the header size and the widget size work in the same image. I also don't really understand the difference between these options. On the post itself I've disabled the images, but if I customize code for one of them in the CSS or php or something to make this work on the blog listing page that works too. Theme Options Featured Image Full Image Slider Image Disable Image evergreenhomeenergy.com/blog