Final answer:
The area below the z-score of -0.84 using the standard normal table is 0.2005, which can be found by looking up the z-score in the z-table.
Step-by-step explanation:
The question asks us to find the area below a z-score of -0.84 using the standard normal table. To determine this area, we look up the z-score in the z-table, which provides us with the cumulative area from the left of the curve up to that z-score. The area under the curve represents the probability that a value is less than the z-score in a standard normal distribution.
The z-table tells us that the corresponding area to the left of a z-score of -0.84 is 0.2005. Thus, the answer to the question is option a) 0.2005, which represents the proportion or probability of observing a z-score less than or equal to -0.84.