To represent the passages that are above 6 meters in elevation, you would use a graph that shows values starting just above 6 and extending to the right, indicating all numbers greater than 6. This would be represented with an open circle at positive 6, showing that 6 itself is not included, and a shaded arrow extending to the right to indicate all values above 6.
Therefore, the correct graph is: Image with alt text: A number line with an open circle at positive 6 and a shaded arrow to the right.