To display the currency symbol on the right side, you have to create and apply custom number format. The creation of own number format is quite easy. You can also choose, if there should be a whitespace between value and currency.
Select the cells with currency values:
Click on number format field and select More Number Formats
Then select Custom
in category section:
Enter custom number format into Type
field, for example #,##0.00 $
The result should look like: