The standard score is an estimation of your logical ability, relative to the working population.
The most common standard scores are 5 and 6. The percentile range for these scores is wide due to the fact that it covers a large part of the population. Standard scores above 9 or below 2 are much less common, resulting in narrow percentile ranges.
The test is adaptive, which means that the tasks are uniquely selected for each individual to be challenging but not impossible. A person with a logical ability above average, for example, will get questions that are above average in difficulty. This is why two people with the same number of correct answers can get different standard scores.
Keep in mind when interpreting your results that logic ability is far from the only thing determining job performance or career success. Factors such as personality, motivation, values, and experience are also important, and strengths in one area may outweigh weaknesses in another.