Image Not Appearing

[Title de-capitalized; please do not shout at us]

I have a website that I created
am trying to add an image to a new page..
I click on the “Add Media” and then click on the image I want in the page.. I change the wording from alignleft to alignright to put the image on the right side of the page,
the image is 873×1200 size… 1 MB

but when I add it to the page, it comes up as 150×150 which does not allow the entire poster image to appear… I changed the size to 873×1200 but now nothing shows… I cannot get it to work correctly

when I click on the image to add to the page, this is the code that appears on the page

<img src=”http://www.inderjitnagra.com/wp-content/uploads/2016/07/Inder-booking-Info-150×150.png&#8221; alt=”Booking Info” width=”150″ height=”150″ class=”alignleft size-thumbnail wp-image-511″ />

The image is a poster with contact information for show bookings

if I leave it as 150.150 the poster does not appear correctly… you have to click the image to bring up in another screen… if I change to the correct size of the image, it only appears as a little square that you can click on to bring up the poster
I want the poster to appear on the page entirely… HOW do I get it to work correctly… WHY is it not displaying correctly??

thank you