To change your shop currency settings go to: WooCommerce > Settings > General > Currency Options and select your desired currency from the Currency drop down.
Currency – Choose the currency the store will be priced in.
Currency Position – Choose whether the currency symbol is placed to the left or right of the price.
Thousand Separator – Choose the character to use for the thousand separators.
Decimal Separator – Choose the character to use for the decimal separator.
Number of Decimals – Choose the number of digits to appear after the decimal separator.