What makes a good Industry Score™ is relative, because it depends on your personal goals as a writer, and it depends on the scores of other similar projects (which share the same genre and/or format). However, it is worth noting that over 50% of all projects have an Industry Score that is below 200 and scripts with a score of 300 and above frequently earn a spot on The Red List. Very, very few projects earn a score higher than 500.
It's important to note that Industry Score™ is not a metric of quality, it's a metric of confidence of quality, which increases with more strong evaluations.
Less than 5 qualifying evaluations will result in a sub-optimal Industry Score because the confidence quotient is low.
Take a look at this chart of Coverfly-qualifying competitions.