Final answer:
Ribbons should be placed above the left pocket on dress blues in accordance with military dress regulations.
Step-by-step explanation:
When ribbons are worn on military dress blues, the correct placement is above the left pocket. This positioning ensures that the ribbons are visible and in accordance with military dress regulations. Ribbons should be worn in rows with the most senior ribbon (highest precedence) at the top right of the row and subsequent ribbons arranged in order of precedence from right to left and top to bottom.